LuxMeasure vs Candela

Measure light intensity instantly with your iPhone camera. LuxMeasure gives you accurate, real-time illuminance readings — no ads, no account, no tracking. FEATURES • Real-time lux measurement using camera sensor • Foot-candle conversion (tap to toggle) • Front and back camera support • Session statistics: min, max, and average • Live sparkline chart showing light changes over time • Hold/lock readings for easy recording • Save measurements with timestamps • Contextual light level labels • Works completely offline BUILT FOR ACCURACY Uses the ISO 2720 photographic exposure standard to calculate illuminance from camera exposure data. Independent calibration for front and back cameras. PERFECT FOR • Indoor plant growers — find the brightest spot for your plants • Photographers — check ambient light levels • Home & office — verify lighting for comfort and eye health • Quick lighting checks — no expensive equipment needed PRIVACY FIRST No ads. No tracking. No data collection. No account required. Everything runs on your device.

Candela turns the camera into a genuinely useful light meter. Point your iPhone and read the light around you — live illuminance in lux or foot-candles, exposure value (EV), and color temperature in Kelvin — on one beautiful instrument with a camera-iris dial that opens and closes with the light. One meter, three jobs: PHOTO / FILM • Live EV at ISO 100, plus a full exposure-triangle solver — lock any two of ISO, aperture, and shutter and Candela computes the third. • Color temperature readout for white balance. • Perfect for film shooters, manual photographers, and anyone learning exposure. PLANT • Convert measured light into PPFD and a projected Daily Light Integral (DLI) for the hours your plant gets light. • Instantly see whether a windowsill is deep shade, low, medium, bright-indirect, or direct sun — with example plants for each level. • Stop guessing why your monstera is leggy. ROOM / WELLBEING • Compare a spot against recommended light levels for reading, kitchen work, an office desk, and more. • A clear verdict — too dim, comfortable, or bright — plus a color-temperature note for evening, sleep-friendly lighting. Built for trust: • Calibrate to any reference in one tap so your readings match a meter you trust. • Lux or foot-candles, your choice. • Save a "spot" to remember a reading, with a tidy history. • A built-in Guide explains plant light needs, room standards, and a photographer's EV chart. Private by design: • Everything runs on your device. Camera frames are analyzed live and are never saved, photographed, or sent anywhere. • No account. No tracking. No ads. Data Not Collected. A note on accuracy: a phone camera is a reflected/scene light meter, so readings are a well-calibrated estimate rather than a laboratory instrument. For incident-style readings, meter off a neutral gray card. Calibration lets you dial Candela in to a reference.